| 1. |
- Matsusaki, M, et al.
(författare)
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Nanosphere induced gene expression in human dendritic cells
- 2005
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Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 5:11, s. 2168-2173
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Tidskriftsartikel (refereegranskat)abstract
- The molecular mechanisms of nanosphere-induced mucosal immunization are important to decipher, since this can form the basis for novel approaches in, e.g., nasal vaccination. In this study, we have investigated the effect of nanospheres as antigen carriers on immature human dendritic cells. The results clearly indicate that tetanus toxoid immobilized nanospheres have a direct effect on human monocyte derived dendritic cells and induce a specific transcriptional profile involving genes crucial for phagocytosis and a protective immune response.
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| 2. |
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| 3. |
- Roman, M., et al.
(författare)
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Quantitation of seven low-dosage antipsychotic drugs in human postmortem blood using LC-MS-MS
- 2008
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Ingår i: Journal of Analytical Toxicology. - : Preston Publications Inc. - 0146-4760 .- 1945-2403. ; 32:2, s. 147-155
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Tidskriftsartikel (refereegranskat)abstract
- In forensic toxicology, antipsychotic drugs are of considerable interest because of their abuse potential and their involvement in intoxications and suicides. In recent years, several new drugs dosed at low levels have entered the market and have put further demands on assays used. The aim of this work was to develop a validated liquid chromatography-tandem mass spectrometry assay for the quantitation of the low-dosage antipsychotic drugs buspirone, fluphenazine, flupenthixol, perphenazine, risperidone, ziprasidone, and zuclopenthixol in human postmortem blood. After liquid-liquid extraction using methyl t-butyl ether, compounds were separated on a Zorbax SB-CN column. Calibration curves were linear in the range 0.8-100 microg/L (r > 0.998) for all drugs. Both within- and between-day coefficients of variation were lower than 25% for all drugs at the LOQ, and extraction recoveries ranged between 58 and 112%. The possible presence of matrix effects was closely investigated. Fifty-four authentic samples were analyzed within the routine postmortem investigation, which resulted in the diagnosis of three fatal intoxications. Even though only a few intoxications were identified, the assay may present valuable information on suicidal deaths in psychotic patients where a true negative result implies noncompliance and a higher susceptibility for suicide. Without a sensitive enough method, this conclusion cannot be drawn. Therefore, we believe that antipsychotic drugs must be measured not only in toxic concentrations but also in therapeutic levels in postmortem cases
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| 4. |
- Hannelius, U, et al.
(författare)
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Large-scale zygosity testing using single nucleotide polymorphisms
- 2007
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Ingår i: Twin research and human genetics : the official journal of the International Society for Twin Studies. - : Cambridge University Press (CUP). - 1832-4274. ; 10:4, s. 604-625
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Tidskriftsartikel (refereegranskat)abstract
- A requirement for performing robust genetic and statistical analyses on twins is correctly assigned zygosities. In order to increase the power to detect small risk factors of disease, zygosity testing should also be amenable for high throughput screening. In this study we validate and implement the use of a panel of 50 single nucleotide polymorphisms (SNPs) for reliable high throughput zygosity testing and compare it to a panel of 16 short tandem repeats (STRs). We genotyped both genomic (gDNA) and whole genome amplified DNA (WGA DNA), ending up with 47 SNP and 11 STR markers fulfilling our quality criteria. Out of 99 studied twin pairs, 2 were assigned a different zygosity using SNP and STR data as compared to self reported zygosity in a questionnaire. We also performed a sensitivity analysis based on simulated data where we evaluated the effects of genotyping error, shifts in allele frequencies and missing data on the qualitative zygosity assignments. The frequency of false positives was less than 0.01 when assuming a 1% genotyping error, a decrease of 10% of the observed minor allele frequency compared to the actual values and up to 10 missing markers. The SNP markers were also successfully genotyped on both gDNA and WGA DNA from whole blood, saliva and filter paper. In conclusion, we validate a robust panel of 47 highly multiplexed SNPs that provide reliable and high quality data on a range of different DNA templates.
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| 5. |
- Santegoets, Saskia J A M, et al.
(författare)
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Transcriptional profiling of human skin-resident Langerhans cells and CD1a+ dermal dendritic cells: differential activation states suggest distinct functions.
- 2008
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Ingår i: Journal of Leukocyte Biology. - : Oxford University Press (OUP). - 1938-3673 .- 0741-5400. ; 84, s. 143-151
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Tidskriftsartikel (refereegranskat)abstract
- In human skin, two main populations of dendritic cells (DC) can be discriminated: dermal DC (DDC) and epidermal Langerhans cells (LC). Although extensively studied, most of the knowledge about DDC and LC phenotype and function is obtained from studying DDC and LC cultured in vitro or DDC and LC migrated from skin explants. These studies have left the exact relationship between steady-state human LC and DDC unclear: in particular, whether CD1a(+) DDC represent migrated LC or whether they constitute a separate subset. To gain further insight in the kinship between skin-resident CD1a(+) DDC and LC, we analyzed CD1a(+) DDC and LC, isolated from steady-state skin samples, by high-density microarray analysis. Results show that the CD1a(+) DDC specifically express markers associated with DDC phenotype, such as the macrophage mannose receptor, DC-specific ICAM-grabbing nonintegrin, the scavenger receptor CD36, coagulation factor XIIIa, and chemokine receptor CCR5, whereas LC specifically express Langerin, membrane ATPase (CD39), and CCR6, all hallmarks of the LC lineage. In addition, under steady-state conditions, both DC subsets display a strikingly different activation status, indicative of distinct functional properties. CD1a(+) DDC exhibit a more activated, proinflammatory, migratory, and T cell-stimulatory profile, as compared with LC, whereas LC mainly express molecules involved in cell adhesion and DC retention in the epidermis. In conclusion, transcriptional profiling is consistent with the notion that CD1a(+) DDC and LC represent two distinct DC subsets but also that under steady-state conditions, CD1a(+) DDC and epidermal LC represent opposites of the DC activation spectrum.
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